|Home World||Galvan Prime|
|Age||200-300 years old|
|Powers and Abilities|
|Voice Actor||Tara Strong|
|First Appearance||Trouble Helix|
Unlike most Galvans, her pupils are dark green instead of black.
Ben 10: Omniverse
- Trouble Helix (first appearance; flashback; cameo)
- Showdown: Part 1
- Showdown: Part 2 (cameo)
- Blukic and Driba Go to Area 51 (flashback; cameo)
- The End of an Era (future; cameo)
- According to Derrick J. Wyatt, Fergi is pretty young at probably 200/300 years old.
- She's based on the character of Sari Sumdac, from Transformers Animated, which was also designed by Derrick J. Wyatt.